Enhance the 'utc' modifier on date/time functions so that if the LHS is
already known to be in UTC, the modifier becomes a no-op. This is not an
incompatibility because the behavior is documented as "undefined" in that
scenario.

Enhance the 'utc' modifier on date/time functions so that if the LHS is
already known to be in UTC, the modifier becomes a no-op. This is not an
incompatibility because the behavior is documented as "undefined" in that
scenario.
check-in: b910a3d5 user: drh tags: trunk